Added functionality to chrome://net-internals/#chromeos page that user

chrome/browser/ui/webui/net_internals/net_internals_ui.cc

Index: chrome/browser/ui/webui/net_internals/net_internals_ui.cc
diff --git a/chrome/browser/ui/webui/net_internals/net_internals_ui.cc b/chrome/browser/ui/webui/net_internals/net_internals_ui.cc
index 4d77bf8f2cf30439ff2a6f81c66cfa5f84e1e3e7..9ccef45e7ca8b1e9161469fd3012988164edcc86 100644
--- a/chrome/browser/ui/webui/net_internals/net_internals_ui.cc
+++ b/chrome/browser/ui/webui/net_internals/net_internals_ui.cc
@@ -72,6 +72,8 @@
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/cros/network_library.h"
 #include "chrome/browser/chromeos/system/syslogs_provider.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/debug_daemon_client.h"
 #endif
 #ifdef OS_WIN
 #include "chrome/browser/net/service_providers_win.h"
@@ -187,6 +189,9 @@ class NetInternalsMessageHandler
   void OnRefreshSystemLogs(const ListValue* list);
   void OnGetSystemLog(const ListValue* list);
   void OnImportONCFile(const ListValue* list);
+  void OnSetNetworkDebugMode(const ListValue* list);
+  void OnSetNetworkDebugModeCompleted(const std::string& subsystem,
+                                      bool succeeded);
 #endif
 
  private:
@@ -556,6 +561,10 @@ void NetInternalsMessageHandler::RegisterMessages() {
       "importONCFile",
       base::Bind(&NetInternalsMessageHandler::OnImportONCFile,
                  base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
+      "setNetworkDebugMode",
+      base::Bind(&NetInternalsMessageHandler::OnSetNetworkDebugMode,
+                 base::Unretained(this)));
 #endif
 }
 
@@ -1268,6 +1277,32 @@ void NetInternalsMessageHandler::OnImportONCFile(const ListValue* list) {
   SendJavascriptCommand("receivedONCFileParse",
                         Value::CreateStringValue(error));
 }
+
+void NetInternalsMessageHandler::OnSetNetworkDebugMode(const ListValue* list) {
+  std::string subsystem;
+  if (list->GetSize() != 1 || !list->GetString(0, &subsystem))
+    NOTREACHED();
+  chromeos::DBusThreadManager::Get()->GetDebugDaemonClient()->
+      SetDebugMode(
+          subsystem,
+          base::Bind(
+              &NetInternalsMessageHandler::OnSetNetworkDebugModeCompleted,
+              AsWeakPtr(),
+              subsystem));
+}
+
+void NetInternalsMessageHandler::OnSetNetworkDebugModeCompleted(
+    const std::string& subsystem,
+    bool succeeded) {
+  std::string status;
+  if (succeeded)
+    status = "Debug mode is changed to " + subsystem;
+  else
+    status = "Failed to change debug mode to " + subsystem;
+  SendJavascriptCommand("receivedSetNetworkDebugMode",
+                        Value::CreateStringValue(status));
+}
+
 #endif
 
 void NetInternalsMessageHandler::IOThreadImpl::OnGetHttpPipeliningStatus(